DELIVERIES By the numbers

Busiest day and expected volume:
900 million letters and packages Monday for the U.S. Postal Service.
20 million Tuesday for UPS.
8.5 million packages last Monday for FedEx.
The fleets:
More than 70,600 vehicles and aircraft for FedEx.
Nearly 95,600 vehicles for UPS.
Online tracking:
3.5 million to 4 million daily for FedEx.
Up to 16 million daily for UPS.
Washington Post
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